<template>
  <div class="app-container">
    <el-form ref="role" :model="role" :rules="validateRules" label-width="120px">
      <el-form-item label="角色名称" prop="roleName">
        <el-input v-model="role.roleName"/>
      </el-form-item>
      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>

  import roleApi from '@/api/acl/role'

  const defaultForm = {
    roleName: ''
  }

  export default {
    data() {
      return {
        role: defaultForm,
        saveBtnDisabled: false, // 保存按钮是否禁用,
        validateRules: {
          roleName: [{required: true, trigger: 'blur', message: '角色名必须输入'}]
        }
      }
    },

    // 监听器
    watch: {
      $route(to, from) {
        console.log('路由变化......')
        console.log(to)
        console.log(from)
        this.init()
      }
    },

    // 生命周期方法（在路由切换，组件不变的情况下不会被调用）
    created() {
      console.log('form created ......')
      this.init()
    },

    methods: {

      // 表单初始化
      init() {
        debugger
        if (this.$route.params && this.$route.params.id) {
          const id = this.$route.params.id
          this.fetchDataById(id)
        } else {
          // 对象拓展运算符：拷贝对象，而不是赋值对象的引用
          this.role = {...defaultForm}
        }
      },

      saveOrUpdate() {
        this.$refs.role.validate(valid => {
          if (valid) {
            this.saveBtnDisabled = true // 防止表单重复提交
            if (!this.role.id) {
              this.saveData()
            } else {
              this.updateData()
            }
          }
        })
      },

      // 新增讲师
      saveData() {
        roleApi.save(this.role).then(response => {
          // debugger
          if (response.success) {
            this.$message({
              type: 'success',
              message: response.message
            })
            this.$router.push({path: '/acl/role/list'})
          }
        })
      },

      // 根据id更新记录
      updateData() {
        // teacher数据的获取
        roleApi.updateById(this.role).then(response => {
          if (response.success) {
            this.$message({
              type: 'success',
              message: response.message
            })
            this.$router.push({path: '/acl/role/list'})
          }
        })
      },

      // 根据id查询记录
      fetchDataById(id) {
        roleApi.getById(id).then(response => {
          debugger
          this.role = response.data.item
        })
      }

    }
  }
</script>
